Rework build: add special cases for AIX
[openssl.git] / crypto / ec / ec_kmeth.c
1 /*
2  * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9
10 #include <string.h>
11 #include <openssl/ec.h>
12 #include <openssl/engine.h>
13 #include <openssl/err.h>
14 #include "ec_lcl.h"
15
16
17 static const EC_KEY_METHOD openssl_ec_key_method = {
18     "OpenSSL EC_KEY method",
19     0,
20     0,0,0,0,0,0,
21     ossl_ec_key_gen,
22     ossl_ecdh_compute_key,
23     ossl_ecdsa_sign,
24     ossl_ecdsa_sign_setup,
25     ossl_ecdsa_sign_sig,
26     ossl_ecdsa_verify,
27     ossl_ecdsa_verify_sig
28 };
29
30 static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
31
32 const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
33 {
34     return &openssl_ec_key_method;
35 }
36
37 const EC_KEY_METHOD *EC_KEY_get_default_method(void)
38 {
39     return default_ec_key_meth;
40 }
41
42 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
43 {
44     if (meth == NULL)
45         default_ec_key_meth = &openssl_ec_key_method;
46     else
47         default_ec_key_meth = meth;
48 }
49
50 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
51 {
52     return key->meth;
53 }
54
55 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
56 {
57     void (*finish)(EC_KEY *key) = key->meth->finish;
58
59     if (finish != NULL)
60         finish(key);
61
62 #ifndef OPENSSL_NO_ENGINE
63     ENGINE_finish(key->engine);
64     key->engine = NULL;
65 #endif
66
67     key->meth = meth;
68     if (meth->init != NULL)
69         return meth->init(key);
70     return 1;
71 }
72
73 EC_KEY *EC_KEY_new_method(ENGINE *engine)
74 {
75     EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
76
77     if (ret == NULL) {
78         ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
79         return NULL;
80     }
81
82     ret->references = 1;
83     ret->lock = CRYPTO_THREAD_lock_new();
84     if (ret->lock == NULL) {
85         ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
86         OPENSSL_free(ret);
87         return NULL;
88     }
89
90     ret->meth = EC_KEY_get_default_method();
91 #ifndef OPENSSL_NO_ENGINE
92     if (engine != NULL) {
93         if (!ENGINE_init(engine)) {
94             ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
95             goto err;
96         }
97         ret->engine = engine;
98     } else
99         ret->engine = ENGINE_get_default_EC();
100     if (ret->engine != NULL) {
101         ret->meth = ENGINE_get_EC(ret->engine);
102         if (ret->meth == NULL) {
103             ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
104             goto err;
105         }
106     }
107 #endif
108
109     ret->version = 1;
110     ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
111
112     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
113         goto err;
114     }
115
116     if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
117         ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_INIT_FAIL);
118         goto err;
119     }
120     return ret;
121
122  err:
123     EC_KEY_free(ret);
124     return NULL;
125 }
126
127 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
128                      const EC_KEY *eckey,
129                      void *(*KDF) (const void *in, size_t inlen, void *out,
130                                    size_t *outlen))
131 {
132     unsigned char *sec = NULL;
133     size_t seclen;
134     if (eckey->meth->compute_key == NULL) {
135         ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
136         return 0;
137     }
138     if (outlen > INT_MAX) {
139         ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_INVALID_OUTPUT_LENGTH);
140         return 0;
141     }
142     if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
143         return 0;
144     if (KDF != NULL) {
145         KDF(sec, seclen, out, &outlen);
146     } else {
147         if (outlen > seclen)
148             outlen = seclen;
149         memcpy(out, sec, outlen);
150     }
151     OPENSSL_clear_free(sec, seclen);
152     return outlen;
153 }
154
155 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
156 {
157     EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
158
159     if (ret == NULL)
160         return NULL;
161     if (meth != NULL)
162         *ret = *meth;
163     ret->flags |= EC_KEY_METHOD_DYNAMIC;
164     return ret;
165 }
166
167 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
168 {
169     if (meth->flags & EC_KEY_METHOD_DYNAMIC)
170         OPENSSL_free(meth);
171 }
172
173 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
174                             int (*init)(EC_KEY *key),
175                             void (*finish)(EC_KEY *key),
176                             int (*copy)(EC_KEY *dest, const EC_KEY *src),
177                             int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
178                             int (*set_private)(EC_KEY *key,
179                                                const BIGNUM *priv_key),
180                             int (*set_public)(EC_KEY *key,
181                                               const EC_POINT *pub_key))
182 {
183     meth->init = init;
184     meth->finish = finish;
185     meth->copy = copy;
186     meth->set_group = set_group;
187     meth->set_private = set_private;
188     meth->set_public = set_public;
189 }
190
191 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
192                               int (*keygen)(EC_KEY *key))
193 {
194     meth->keygen = keygen;
195 }
196
197 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
198                                    int (*ckey)(unsigned char **psec,
199                                                size_t *pseclen,
200                                                const EC_POINT *pub_key,
201                                                const EC_KEY *ecdh))
202 {
203     meth->compute_key = ckey;
204 }
205
206 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
207                             int (*sign)(int type, const unsigned char *dgst,
208                                         int dlen, unsigned char *sig,
209                                         unsigned int *siglen,
210                                         const BIGNUM *kinv, const BIGNUM *r,
211                                         EC_KEY *eckey),
212                             int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
213                                               BIGNUM **kinvp, BIGNUM **rp),
214                             ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
215                                                    int dgst_len,
216                                                    const BIGNUM *in_kinv,
217                                                    const BIGNUM *in_r,
218                                                    EC_KEY *eckey))
219 {
220     meth->sign = sign;
221     meth->sign_setup = sign_setup;
222     meth->sign_sig = sign_sig;
223 }
224
225 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
226                               int (*verify)(int type, const unsigned
227                                             char *dgst, int dgst_len,
228                                             const unsigned char *sigbuf,
229                                             int sig_len, EC_KEY *eckey),
230                               int (*verify_sig)(const unsigned char *dgst,
231                                                 int dgst_len,
232                                                 const ECDSA_SIG *sig,
233                                                 EC_KEY *eckey))
234 {
235     meth->verify = verify;
236     meth->verify_sig = verify_sig;
237 }
238
239 void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
240                             int (**pinit)(EC_KEY *key),
241                             void (**pfinish)(EC_KEY *key),
242                             int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
243                             int (**pset_group)(EC_KEY *key,
244                                                const EC_GROUP *grp),
245                             int (**pset_private)(EC_KEY *key,
246                                                  const BIGNUM *priv_key),
247                             int (**pset_public)(EC_KEY *key,
248                                                 const EC_POINT *pub_key))
249 {
250     if (pinit != NULL)
251         *pinit = meth->init;
252     if (pfinish != NULL)
253         *pfinish = meth->finish;
254     if (pcopy != NULL)
255         *pcopy = meth->copy;
256     if (pset_group != NULL)
257         *pset_group = meth->set_group;
258     if (pset_private != NULL)
259         *pset_private = meth->set_private;
260     if (pset_public != NULL)
261         *pset_public = meth->set_public;
262 }
263
264 void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
265                               int (**pkeygen)(EC_KEY *key))
266 {
267     if (pkeygen != NULL)
268         *pkeygen = meth->keygen;
269 }
270
271 void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
272                                    int (**pck)(unsigned char **pout,
273                                                size_t *poutlen,
274                                                const EC_POINT *pub_key,
275                                                const EC_KEY *ecdh))
276 {
277     if (pck != NULL)
278         *pck = meth->compute_key;
279 }
280
281 void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
282                             int (**psign)(int type, const unsigned char *dgst,
283                                           int dlen, unsigned char *sig,
284                                           unsigned int *siglen,
285                                           const BIGNUM *kinv, const BIGNUM *r,
286                                           EC_KEY *eckey),
287                             int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
288                                                 BIGNUM **kinvp, BIGNUM **rp),
289                             ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
290                                                      int dgst_len,
291                                                      const BIGNUM *in_kinv,
292                                                      const BIGNUM *in_r,
293                                                      EC_KEY *eckey))
294 {
295     if (psign != NULL)
296         *psign = meth->sign;
297     if (psign_setup != NULL)
298         *psign_setup = meth->sign_setup;
299     if (psign_sig != NULL)
300         *psign_sig = meth->sign_sig;
301 }
302
303 void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
304                               int (**pverify)(int type, const unsigned
305                                               char *dgst, int dgst_len,
306                                               const unsigned char *sigbuf,
307                                               int sig_len, EC_KEY *eckey),
308                               int (**pverify_sig)(const unsigned char *dgst,
309                                                   int dgst_len,
310                                                   const ECDSA_SIG *sig,
311                                                   EC_KEY *eckey))
312 {
313     if (pverify != NULL)
314         *pverify = meth->verify;
315     if (pverify_sig != NULL)
316         *pverify_sig = meth->verify_sig;
317 }